+ = | ×6= | 270÷1= | 2÷ = |
| 5-0.25= | 4.5×100= | 2.4+1.6= | 7÷0.25= |
| 0×103= | 18+15= | 12.56÷3.14= | 130×7= |
| 1.2÷2%= | 0.75×8= | 0.33= | ×45= |
| 3.14×7= | 3.14×0.8= | × = | 64÷0.4= |
+ = | - = | 1.4÷0.2= | 0.9- = |
+ = | 0.32+3.2= | + +2= | 2.4×5= |
× ÷ × = | 1.3×0.8×12.5= |
解: + =1, | ×6= , | 270÷1=270, | 2÷ =10, |
| 5-0.25=4.75, | 4.5×100=450, | 2.4+1.6=4, | 7÷0.25=28, |
| 0×103=0, | 18+15=33, | 12.56÷3.14=4, | 130×7=910, |
| 1.2÷2%=60, | 0.75×8=6, | 0.33=0.027, | ×45=35, |
| 3.14×7=21.98, | 3.14×0.8=2.512, | × = , | 64÷0.4=160, |
+ = , | - = , | 1.4÷0.2=7, | 0.9- =0.3, |
+ = , | 0.32+3.2=3.52, | + +2=2 , | 2.4×5=12, |
× ÷ × = , | 1.3×0.8×12.5=13. |
分析:0×103根据0乘任何数都得0求解;0.33=0.3×0.3×0.3,由此求解;
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+2按照从左到右的顺序计算;
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先把除法变成乘法,然后运用乘法结合律简算;1.3×0.8×12.5运用乘法结合律简算;其它题目根据运算法则直接求解.点评:本题考查了基本的计算,计算时要细心,注意小数点的位置以及把结果化成最简分数.
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